<template>
  <el-container class="home-container">
<!--    头部区域-->
    <el-header>
      <div>
        <img src="../assets/img/heima.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
<!--    页面主体区域-->
    <el-container>
<!--      侧边栏-->
      <el-aside :width="isCollapse?'64px':'200px'">
<!--        侧边栏菜单区域-->
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
          router
          :collapse-transition="false"
          :collapse="isCollapse"
          :default-active="activePath"
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409eff"
          unique-opened>
<!--          一级菜单-->
          <el-submenu :index="item.id.toString()" v-for="item in menuList" :key="item.id">
<!--            一级菜单的模板区域-->
            <template slot="title">
<!--              图标-->
              <i :class="iconsObj[item.id]"></i>
<!--              文本-->
              <span>{{item.authName}}</span>
            </template>
<!--            二级菜单-->
            <el-menu-item
              @click="saveNavState('/'+subItem.path)"
              :index="'/'+subItem.path"
              v-for="subItem in item.children"
              :key="subItem.id">
              <template slot="title">
                <!--              图标-->
                <i class="el-icon-menu"></i>
                <!--              文本-->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
<!--      右侧内容主体-->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  name: 'Home',
  data () {
    return {
      // 左侧菜单数据
      menuList: [],
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠
      isCollapse: false,
      // 别激活的链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('acticvePath')
  },
  methods: {
    // 退出
    logout () {
      // 清空 session
      window.sessionStorage.clear()
      // 从定向到登录页
      this.$router.push('/login')
    },
    // 获取所有菜单
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
      this.menuList = res.data
    },
    // 点击按钮，点击切换
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接激活状态
    saveNavState (activePath) {
      // 保存到session
      window.sessionStorage.setItem('acticvePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style scoped lang="less">
.home-container{
  height: 100%;
}
.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: white;
  font-size: 20px;
  div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside{
  background-color: #333744;
  .el-menu{
    border-right: none;
  }
  .toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: white;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
}
.el-main{
  background-color: #EAEDF1;
}
.iconfont{
  margin-right: 10px;
}
</style>
